Apparatus for measuring and recording oscillating movements of bodies.



No.' 693,990. Patented Feb. 25, |902.

m.Anup,.T.=-, ,l P APPARATUS FDR MEASURING AND RECORDING DSCILLATING HOVEIENTS 0F BUDIES.

(Application med nee. 1o. 189s.)

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No. 693,990. Patented Feb. 25, |902. M'. ABNDT.

APPAR'A'IMS FOB MEA-.SURINGYAND RECORDING OSCll-.LATING MUVEMYETS 0F BDIES.

(Application filed. .Dec. 10. 1898.) (llo Model.) 2 Sheets-Sheet 2.

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` UNITED STATES MAX ARNDT, or AiX-LA-or'rArELLn, GERMANY.

APPARATUS FOR MEASURING AND RECORDING OSCILLATING MOVEMENTS OF BODIES.

SPECIFXCATION forming part of Letters Patent No. 693,990, dated February 25, 1902.y

v Application filed December lO, 18,98. Serial No, 698,933.` (No model.)

A the King of Prussia, German Emperor, residing at the city of Aix-la-Chapelle, Germany, have invented a new and useful Apparatus for Measuring andRecording Oscillating or Reciprocating Movements of Bodies, for which I have filed an application' for patent in France on May 12,1898, and in GermanyY on May 25, 1898,) of which the following is a specification.

My invention relates to an apparatus-for measuring and recording oscillating or reciprocating movements of bodies forming parts of instruments, machines, and the like.

My inventiony consists of an 'apparatus which is composed of an air-conduit connected at one end with an exhauster or similar de,-

vice and provided at the other end with a valve intermittingly closed and opened, theV said conduit communicating at the same time with the interior of a movable bell or receptacle locked against the atmosphere and composed of a lever connected to the saidbell or receptacle and carrying a pen for recording' its strokes on the surface of a uniformly rotating drum, these strokes being controlled by a gage-piece to which is imparted thek movement to be recorded. V

I have represented my invention in the accompanying drawings, of which--A Figure 1 is a complete view .of the' apparatus, showing in section the bell or' receptacle and the air-conduit, an exhauster or like device being omitted. Fig. 1 is a similar view, on a reduced scale, of a modification of my invention. Fig. 2 is a sectional view of a part of another modification thereof, and Fig. 3 an enlarged view ofra part of the modification of my invention represented in Fig. 4 on a reduced scale.

Referring first to Fig. 1, a conical gage- Y piece 1 is connected by a rod 1a tothe recippiece 4, guided by a slot 5a on a guide-plate 5' and connected bya link 6 to lever-arm 7 C of a lever 7, which is pivoted to a stud 7d, the left-hand arm 7at of lever7being connected by a rod 9 to a floating bell 10 of a gasometer,

andthe right-hand lever-arm 7b of lever c carrying by a rod 25 a pen 26 to record the strokes of lever 7 on a writing-surface 24, provided 011 a rotating drum 23. Floating bell 10 dips into a fluid contained in a vessel 11, and a pipe 1-2 discharges into floating bell 10. Pipe 12 isyprovidedv with lateral extensions 12:L 12b at its bottom, extension 12u being connected by a hose 14 to the chamber of an exhauster or the like and extension 12b by a hose 14? to a pipe 15, which can be temporarily closed or opened by a valve 16 on a lever 17, pivoted at 17 and provided with a laterally-'project- .ing bent arm 18 to engage with notches 19of a rotating cam-disk 20. Lever 17 and camdisk 2O are supported by suitable f rame-pieces carrying a casing 22 for a clockwork, from which a continuously-rotating movement is imparted to the recording-drum 23 and to the cam-disk.- Lever 17 is actuated hya-spring 21, so as to close by its valve pipe 15 whenever the end of arm 18 engages with a notch of cam-disk 20, but keeping open pipe 15 during the passage of the raised cam portions beneath arm 1S. A stop 28 is provided to casing 22 and a roller 27 journaled at the end of rod 25 in order to limit the downward movement and recording action of pen 26.

The operation is as follows: As drum 213 and cam-disk 2O continuously rotate pipe 15 is intermittingly closed by valve 16, while a continuous suction action is exerted by the exhauster or similar device through pipe 14. This results in raref ying the air contained within the fioating bell 10 whenever pipe 15 is kept closed and at the same time lowering bell 10 and swinging lever 7 in adirection to bring Vfin ger 2 into engagement with a step 1C of gage piece 1. I In accordance therewith pen 26 will `be raised and trace a line on the'writing-sur- `face 24 of the drum. The length of this line will obviously correspond to the position of gage-piece 1 occupied at the moment of its being reached by finger 2 in such a manner that the length of the recording-line will increase or decrease in proportion with the more or less elevated position of piece 1 at the moment it is reached by finger 2. Durweight 8 on lever-arm 7b is then raised again, finger 2 releasing at the same time gage-piece 1 and allowing the same to assume another position and pen 26 descending until it is stopped by stop 28. By these means during one rotation of drum 23 the corresponding movement of piece 1-1l c., of the part to which it is suspended and the movement of which is to be recorded-will be indicated by lines ot' different length on the circumference of the writing-surface 24. If", for instance, a slider is connected with the rod 1L and is moved reciprocatingly in the direction of the rod 1a, the different positions of the slider are xed by the entering ot' the finger 2 in special steps of 1,.which responds to the position of the slider. This position is marked on the recording-drum by an irregular line.

In the modification represented in Fig. la similar parts are indicated by similar numerals as in Fig. 1. In this modification lever 7 is pivoted at 7g and connected by a link 7f to the finger 2, which is vertically guided and stopped in its upward stroke by gagepiece 1. In lieu of an exhauster an air-compressing device is supposed to be connected to pipe 14, and a branch pipe 14a communicates with a casing 60, closed by a membrane 61. A rod is guided horizontally bearing at one end against the membrane 6l and carrying at the other end a clamping-plate 62, to press piece 1 against resistance-plate 3 and to keep it temporarily in a fixed position by friction. by the controlling-valve, the floating bell will be raised and atthe same time by the increasing air-pressure within pipe 14a clamping-plate 62 firmly pressed against piece 1, so as to limit the upward movement of inger 2 and ot registering-pen 26. But as the valve opens pipe 14 the pressure decreases within the air-conduit, piece 1 thus being released to assume another position and pen 26 lowered again to its lowermost position.

In Fig. 2 I haverepresented a modification of Fig. 1 of my invention, in which it may be convenient to provide gage-piece 1 within a casing locked against the atmosphere. In this modification an air-tight casing is pror`vided with a receptacle 56, containing a liquid 57 and a partition 58, dipping under the level of the liquid. Finger 2 is guided in a plate 3a, integral with resistance-plate 3 and carried by a U-shaped arm 59, which may be connected at its other end by a pin to slide-piece of similar constr-uction, as slide 4 of Fig. 1.

In Fig. 4Vis shown an arrangementin which the gaging device (see letters of reference a) may be placed at any distance from the recording device. (See let-ters ot reference b.) In Fig. 4 numerals 1 2 3 4 6 7 7 7C 8 9 10 11 12 13 14 15 16 17 18 2O 22 designate the same parts as in Fig. 1. To the arm 7c of lever 7LL fioating bell 30 is suspended, dipping into the Vfluid 32, contained in a vessel 31. (See Fig.

Whenever pipe 14 is kept closed 3.) A pipe 33 discharges into bell 30 and communicates by a pipe 36 with the interior ot the floating bell 34, (see letters of reference b of Fig. 4,) provided in the liquid-containing vessel 35, pipe 33 being continued at 33 to join with the valve 16L of lever 17", which is actuated, as heretofore described, by a cam-disk 20n underneath a casing 38. 'llie latter contains a clockwork to rotate the carndisk and the recording-drum 39, placed above the casing. A recording-pen 41 is connected to alever 40, carrying a weight 8, and at the other end the floating bell 34. In lieu of an exhaus'ter a floating bell 48 is provided, dipping into the liquid 50, contained in a vessel 49, bell 48 being connected by a hose 54 to a pipe 14, which communicates with pipes 12 .and 15. (See letters of reference ct.) Bell 48 is connected to a weight 53 by means of a cord 51, passing on rollers 52, the weight counterbalancing the bell. By lowering the weight 53 bell 48 will be raised and a suction action exerted on floating bell l0, which therefore descends, provided that valve 16 be closed. The said sucking device (see letters of reference d of Fig. 4) may likewise be placed at any distance from the devices a and b. As bell 10 descends floating bell 30 will be raised at the same time and slide 4 moved towardr the gage-piece 1. By the raising movement of bell 30 the air will be sucked up, and therefore fioatiug bell will be lowered, cam-disk 20 being so timed as to open and close valve 16a together with valve 16. Pen 41 is therefore controlled by piece 1 in the same manner as heretofore described with reference to Fig. 1.

By letters of reference c of Fig. 4 I have indicated an alarm device which maybe added in order'to signalize at any distance a predetermined position of gage-piece 1. To this purpose a pipe 44 is to be derived from pipe 33, entering a floating bell 42, which dips into the liquid-containing vessel 43. As the pressure in pipe 33 decreases down to a predetermined degree bell 42 will be lowered, and by means of lever 45 and a contact-lever 46, connected thereto, an electric circuit will be closed to ring abell 47. As the pressure in pipes 33 and 44 increases again levers 45 and 46 will be restored under the inuence of Weight 8b.

It will be obvious that instead ot using a suction device for actuating the apparatus compressed air can be made use of, as described with reference to Fig. 11.

What Iclaim as my. invention, and desire to secure by Letters Patent, is-

1. In an apparatus for measuring and recording movements, the combination of a twobranched air-conduit, a bell or receptacle closed against the atmosphere and communicating with one branch of the air-conduit, a valve for temporarily closing and opening the other branch of the air-conduit, means for actuating the valve, a lever connected to the bell or receptacle, a registerin g-pen connected IOO IIO

to the said lever, a rotating drum coacting connected to the bell or receptacle, a registering-pen connected to the latter lever, a rotating drum coacting with the registeringpen, a linger connected to the pen-actuating lever, anda gage-piece to coact With the said ringer and to assume the movement to be measured and recorded, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

MAX ARNDT.

Witnesses: v

FRANK M. BRUNDAGE, CLARA E. BRUNDAGE. 

